Sphere: The Global Tax Compliance Platform

Sphere is an AI-powered global tax compliance platform that helps companies handle international tax as they scale — automating registration, calculation, filing, and remittance across more than 100 tax authorities. The team recently raised a $21M Series A led by Andreessen Horowitz, after two years in stealth and early adoption from companies like Replit, ElevenLabs, and Lovable. In this conversation with YC's Aaron Epstein, founder Nicholas Rudder shares how he went from “pivot hell” to selling his first 10 contracts off a Figma prototype, why trust mattered more than product in the early days, and how Sphere is building an AI-native tax engine for the next generation of global SaaS companies. Learn more about Sphere at https://www.getsphere.com. Chapters: 00:32 – Nick’s Journey Into “Pivot Hell” 02:05 – Finding the Real Problem: Global Tax 03:48 – Selling the First 10 Contracts 05:42 – Why Trust Matters More Than Product 07:10 – What Makes Global Tax So Hard 09:02 – How Sphere Automates Cross-Border Compliance 11:20 – Going From Stealth to Series A 14:04 – Building an AI-Native Tax Engine 17:58 – Advice for Founders Solving Hard Problems

Nicholas RudderguestAaron Epsteinhost

Nov 19, 202521mWatch on YouTube ↗

EPISODE INFO

Released: November 19, 2025
Duration: 21m
Channel: YC Root Access
Watch on YouTube: ▶ Open ↗

EPISODE DESCRIPTION

Sphere is an AI-powered global tax compliance platform that helps companies handle international tax as they scale — automating registration, calculation, filing, and remittance across more than 100 tax authorities. The team recently raised a $21M Series A led by Andreessen Horowitz, after two years in stealth and early adoption from companies like Replit, ElevenLabs, and Lovable. In this conversation with YC's Aaron Epstein, founder Nicholas Rudder shares how he went from “pivot hell” to selling his first 10 contracts off a Figma prototype, why trust mattered more than product in the early days, and how Sphere is building an AI-native tax engine for the next generation of global SaaS companies. Learn more about Sphere at https://www.getsphere.com. Chapters: 00:32 – Nick’s Journey Into “Pivot Hell” 02:05 – Finding the Real Problem: Global Tax 03:48 – Selling the First 10 Contracts 05:42 – Why Trust Matters More Than Product 07:10 – What Makes Global Tax So Hard 09:02 – How Sphere Automates Cross-Border Compliance 11:20 – Going From Stealth to Series A 14:04 – Building an AI-Native Tax Engine 17:58 – Advice for Founders Solving Hard Problems

SPEAKERS

Nicholas Rudder
guest
Founder/CEO of Sphere, an AI-powered global indirect tax compliance platform (sales tax/VAT/GST).
Aaron Epstein
host
Host of YC Root Access who interviews founders about their companies and go-to-market lessons.

EPISODE SUMMARY

In this episode of YC Root Access, featuring Nicholas Rudder and Aaron Epstein, Sphere: The Global Tax Compliance Platform explores sphere’s founder story: pivot hell to AI-native global tax platform Nick Rudder recounts shutting down a revenue-generating edtech marketplace after realizing the content model was unscalable and unlikely to become a massive business.

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